GENERAL INFORMATION: 503-823-7404
1120 SW Fifth Ave, Suite 600, Portland, OR 97204
In order to satisfy an unfunded federal water quality mandate, the City of Portland is required to disconnect Portland’s open air reservoirs, including three at Mt. Tabor Park. This work is scheduled to begin in early 2015. Reservoir 7, which is enclosed at Mt. Tabor Park, will stay in service.
Video Overview of Proposed Project
Scope of Work
Several types of disconnection work are necessary. Some buried pipe will have to be removed, and some new pipe will be installed below ground. Other work will take place inside vaults, both above and below ground, and other structures. None of this work will damage or make non-reversible alterations to the open reservoirs or other historic structures.
Three major tasks are proposed:
1. Water pipes entering and leaving the open reservoirs will be disconnected, leaving an “air-gap” between the reservoirs, dead-end lengths of pipe and the active water system. This generally involves a "cut and plug" which entails removing approximately a 10-foot section of pipe and then closing the openings. It is important to note that this disconnection will not prevent water from entering the reservoirs in the future. Existing large-diameter pipes will allow water to flow into the reservoirs, but water will flow to the sewer system rather than the water distribution system when it leaves the reservoirs.
2. New connections will be made between some large diameter transmission pipelines to allow the water to be rerouted around the reservoirs.
3. A new transmission pipeline will be constructed between a supply conduit on the south side of Mt. Tabor and the transmission pipeline located in SE Lincoln, west of the park.
During the proposed construction both inside the park and on the nearby street, the Portland Water Bureau and its contractor will work to protect trees and the reservoir and park facilities not impacted by the work.
The FAQs we have developed are designed to provide a better understanding of the proposed project and schedule, construction impacts, preservation, public feedback opportunities, costs, park amenities, and long-term planning.
Mt. Tabor Park is a historic community asset and an important part of our parks system.